In most cases when a low voltage circuit blows a fuse, it's because one of the circuits is shorted to ground or common—rubbed-out wires, shorted components or boards, etc. Less commonly, you will see the low voltage circuit draw high amperage because of magnetic solenoids that are energized, but the mechanical pin, stem, or armature […]

When you first start servicing pool heaters, the water flow circuit can feel a bit intimidating. In this article, I'm going to cover the pool circuit basics and common water flow issues that screw up our heaters. If you would like to brush up on the basics of pool heaters before diving into troubleshooting tactics, […]

In order to wrap my head around diagnostic issues, it helps me engage in thought experiments where I think of more extreme examples of an issue or situation or consider the ideal to find the “edges” of a concept. Once I find the extreme edges, I can begin to sort down to a more exact […]